Chemical Engineering Basics MCQs – Latest Competitive Chemical Engineering MCQs
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Latest Chemical Engineering MCQs
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Latest Chemical Engineering Basics Mcqs
The most occurred mcqs of Chemical Engineering Basics in past papers. Past papers of Chemical Engineering Basics Mcqs. Past papers of Chemical Engineering Basics Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemical Engineering Basics Mcqs. The Important series of Chemical Engineering Basics Mcqs are given below:
Which of the following is an ore dressing operation ?
A. Classification
B. Roasting
C. Smelting
D. None of these
Shampoos are commercially not available in the form of ___________________?
A. Solution
B. Gaseous mixture
C. Powder
D. Emulsion
In multipass welds, shot peening is done after each pass to__________________?
A. Close the surface porosity
B. Flatten the weldment
C. Break the continuity of columnar grains
D. Introduce texture in the weld
Pick out the correct combination about the role of various additives used in polymers ?
A. Heat stabiliser: increases the maximum service temperature
B. Plasticiser: increases the polymer strength
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers
Which of the following is not used as a bearing material ?
A. Babbitts
B. Copper-lead alloys
C. Bronzes
D. Cermets
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
A. Lead
B. Aluminium
C. Copper
D. Wrought iron
Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
A. Removed by acid pickling
B. Removed with coarse emery cloth
C. Hammered into the surface
D. Left as such to protect the surface
Case hardening is not done by________________?
A. Electroplating
B. Hot dipping
C. Nitriding
D. Both ‘B’ & ‘C’
Upto the critical radius of insulation, added insulation, will____________________?
A. Decrease heat flux
B. Decrease heat loss and will have no effect beyond that
C. Increase the heat loss
D. Reduce convection heat loss compared to conduction heat less
Chlorine acts as a bleaching agent only in the presence of ______________________?
A. Pure oxygen
B. Dry air
C. Moisture
D. Sunlight
Powder metallurgy technique is used in the production of ____________________ tools ?
A. Tungsten carbide
B. High speed steel
C. High carbon steel
D. Drilling
Rain drops falling through atmospheric air attain limited terminal velocity, because of ____________________?
A. Force of gravity
B. Viscous force exerted by air
C. Surface tension effects of water
D. Upward thrust due to air
Volume of blast furnace slag is about _______________ times the volume of hot metal (pig iron) of the same weight ?
A. 5
B. 3
C. 1.5
D. 7
Colour comparator is used to measure the___________________?
A. pH value
B. Colour intensity
C. Electrode potential
D. None of these
A reduction in thermal resistance during heat transfer does not occur in the___________________?
A. Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity
B. Convection heat transfer by stirring the fluid and cleaning the heating surface
C. Radiation heat transfer by increasing the temperature and reducing the emissivity
D. None of these
Plastics as a material of construction suffer from the drawback of low_________________?
A. Density
B. Machinability
C. Strength
D. Plastic deformation
The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?
A. y2 = 2k1t + k2
B. y = k1 t + k2
C. y = k1 ln (k2t + k3)
D. y = k1t3 + k2
Biological shield in a nuclear reactor is generally provided to protect against the__________________?
A. β-rays
B. α-rays
C. Gamma rays & neutrons
D. Electrons
The most detrimental impurity in high pressure boiler feed water is ___________________?
A. Dissolved salt
B. Suspended salt
C. Silica
D. Turbidity
Sub zero treatment of steel is done to____________________?
A. Enhance its working performance in sub zero atmosphere
B. Suppress martensite transformation
C. Reduce the retained austenite in hardened steel
D. Induce temper brittleness after its hardening
In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?
A. 1/V2
B. V2
C. 1/Vg
D. Vg
Which of the following is not categorised as the ore agglomeration process ?
A. Pelletising
B. Nodulising
C. Balling
D. Briquetting
Tumbling is the process of improving the ________________ of the materials/parts ?
A. Fatigue limit
B. Surface finish
C. Creep limit
D. Surface cleanliness
Young’s modulus of a material is the measure of its ___________________?
A. Stiffness
B. Creep resistance
C. Malleability
D. Tensile strength
Which of the following materials has the least scrap value ?
A. Brass
B. Stainless steel
C. Aluminium
D. Copper
Which of the following is used to produce draught in the locomotive boilers ?
A. Induced draught fan
B. Chimney
C. Forced draught fan
D. Steam jet arrangement
Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is____________________?
A. Very low which prevents their ignition by compression
B. Zero
C. Very high which prevents their ignition by compression
D. None of these
The process of removal of scale formed during hot rolling of steel is termed as_________________?
A. Shot blasting
B. Descaling
C. Pickling
D. Skimming
Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________?
A. Atmospheric pressure is high
B. Atmospheric pressure is low
C. Temperature is low
D. None of these
The leaching solvent used in Baeyer’s process for the purification of bauxite is___________________?
A. Sodium hydroxide
B. Sodium carbonate
C. Ammonium hydroxide
D. Ammonium carbonate
With increase in annealing temperature, the following defect density decreases?
A. Dislocation
B. Vacancy
C. Grain boundary
D. All of these
A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?
A. Aqueous tension
B. Vapor pressure
C. Saturated humidity
D. Absolute humidity
Addition of _______________ to steel does not help in improving its machinability ?
A. Lead
B. Silicon
C. Sulphur
D. Phosphorous
Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?
A. 10
B. 5
C. 20
D. 35
Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?
A. Manganese, chromium & cobalt
B. Tungsten, chromium & cobalt
C. Nickel, cobalt & chromium
D. Tungsten, molybdenum & nickel
_______________ test can be termed as the semi-destructive test?
A. Torsion
B. Impact
C. Hardness
D. Charpy
Dowtherm is a____________________?
A. High temperature heating medium (a petroleum product)
B. Very heat sensitive material
C. Product of coal tar distillation
D. None of these
Boiler tube size is specified by its thickness and _____________________ diameter ?
A. Outside
B. Mean
C. Inside
D. None of these
The rolling process cannot be used to produce______________________?
A. Rods
B. Plates
C. Tubes
D. Wires
In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following _______________________?
A. Jet of water at high pressure
B. Mixture of water and air
C. Blast of air
D. Rain of molten lead
The most suitable material of construction for a sewer to carry sewage under high pressure is________________________?
A. Cement concrete
B. Steel
C. Asbestos cement
D. Stoneware
Which of the following is not a dielectric material ?
A. Asbestos, glass, porcelain and mica
B. Cotton, silk and paper
C. Rubber and polymeric resins
D. All refractory materials
Particle nature of cathode rays is proved due to the fact that they ________________?
A. Produce fluorescence
B. Get deflected by magnetic electric field
C. Travel in a straight line
D. Heat the exposed material
Which of the following is prone to cup and cone fracture ?
A. Soft brass
B. Cast iron
C. Round specimen of ductile metal
D. Flat tensile specimen of ductile metal
Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank) ?
A. H/2
B. H
C. H/4
D. H/6
Austempering process results in the formation of ________________ structure ?
A. Carburised
B. Bainitic
C. Martensitic
D. Stressed
Good design of the casing of a centrifugal pump aims at minimising the __________________________?
A. Frictional losses
B. Cavitation
C. Kinetic energy loss
D. Static head
The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron ?
A. 1837
B. 159
C. 2537
D. 10000
Matte smelting is used in the extraction of_____________________?
A. Zinc
B. Lead
C. Aluminium
D. Copper
Carnot cycle is also termed as the constant _________________ cycle in thermodynamics?
A. Pressure
B. Entropy
C. Volume
D. Heat
Large diameter reinforced cement concrete (RCC) pipes are generally joined by ____________________ joint ?
A. Flexible
B. Collar
C. Flanged iron
D. Expansion
A dummy activity is used in PERT network to describe the_____________________?
A. Precedence relationship
B. Resource restriction
C. Resource idleness
D. Necessary time delay
Unit of viscosity in CGS system is_______________________?
A. gm .cm-1 sec-1
B. gm .cm-2, sec-1
C. gm . cm2 . sec-2
D. gm . cm . sec-1
The refractory lining of the bottom in a basic electric arc furnace is made of___________________?
A. Alumina
B. Silica
C. Magnesia
D. Fireclay
The specific gravity of coal depends mainly on its __________________ content ?
A. Volatile matter
B. Carbon
C. Ash
D. Moisture
In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?
A. 15 to 25
B. 40 to 55
C. 5 to 10
D. 60 to 70
Brittleness induced due to the presence of sulphur in steel can be reduced by adding____________________?
A. Manganese
B. Vanadium
C. Magnesium
D. Copper
With increase in temperature, the surface tension of water_______________________?
A. Remain constant
B. Decreases
C. Increases
D. Increases linearly
Compressed dry air is used as the cutting fluid, while machining____________________?
A. Aluminium
B. Cast iron
C. Steel
D. None of these
With increase in compression ratio, the volumetric efficiency of air compressor____________________?
A. Increases
B. Remain same
C. Decreases
D. May increase or decrease (depends on the suction pressure)
Which of the following has the least value of ultimate tensile strength (UTS) ?
A. Cast iron
B. High carbon steel
C. Medium carbon steel
D. Wrought iron
Current employed in resistance welding ranges from ____________________ kVA/cm2?
A. 7.5 to 8.5
B. 4.5 to 6.2
C. 1.2 to 2.5
D. 10.5 to 15.5
Presence of nickel & chromium in steel does not raise its _________________?
A. Elastic limit
B. Ductility
C. Machining properties
D. Resilience
Materials having ________________ lattice structure are usually the most ductile ?
A. Hexagonal close packed (hcp)
B. Body centred cubic (bcc)
C. Face centred cubic (fcc)
D. None of these
Stresses encountered in the metal forming processes are less than the _____________ of the material?
A. Fracture strength
B. Elastic limit
C. Yield strength
D. Limit of proportionality
Damage to metal surface by mechanical action is called____________________?
A. Corrosion
B. Pitting
C. Erosion
D. None of these
Minimum number of members required to form a Public Limited Joint Stock Com-pany is___________________?
A. 7
B. 12
C. 10
D. 17
Increase in the entropy of a system represents the_____________________?
A. Degradation of energy
B. Increase in the availability of energy
C. Decrease in system pressure
D. Increase in the temperature
Spherical shape of mercury droplets is due to its____________________?
A. Low surface tension
B. High viscosity
C. High density
D. High surface tension
Carbon is present in the form of _______________________ in grey cast iron ?
A. Nodular aggregates of graphite
B. Spheroids
C. Flakes
D. Cementite
The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong _____________________?
A. Base and strong acid
B. Acid and weak base
C. Base and weak acid
D. None of these
‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________?
A. 0°K to 123°K
B. 0°C to – 273°C
C. 0°C to – 123°C
D. 0°K to 273°K
__________________ of air does not increase with increase in temperature?
A. Density
B. Viscosity
C. Thermal diffusivity
D. Thermal conductivity
The value of y = cp/cv. at < 500°C for air & most common gases can be safely assumed to be_____________________?
A. 1
B. 0.8
C. 1.4
D. 1.8
Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?
A. Velocity
B. Output & fineness
C. Both A. & B.
D. None of these
______________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently ?
A. Expansion
B. Flanged
C. Bell and Spigot
D. Collar
The pressure outside a bubble/droplet of liquid is ________________ the internal pressure?
A. Equal to
B. Less than
C. Greater than
D. Unpredictable; depends on the bubble size
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is_____________________?
A. 5CaO. 3 Al2O3
B. 3CaO. SiO2
C. 3CaO. Al2O3
D. 2CaO. SiO2
Oxygen cylinders used for autogenous (cutting/welding) purposes are ___________________?
A. Seamless & made of steel
B. Made by sand casting
C. Heat treated before use
D. Welded steel cylinders
Heating of ferromagnetic materials to a temperature above Curie temperature makes it ________________________?
A. Insulator for heat & electricity transmission
B. Superconductor
C. Behave like paramagnetic materials
D. Ferritic
Which of the, following is not associated with the functioning of a petrol engine ?
A. Compression ignition system
B. Carburettor
C. Spark plug
D. Otto cycle
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ?
A. Cobalt, chromium & tungsten
B. Molybdenum, tungsten & chromium
C. Cobalt, chromium & nickel
D. Cobalt, zirconium & molybdenum
Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost________________?
A. Only
B. Plus variable cost
C. Plus selling expenses
D. Plus overhead cost
Property responsible for the talcum powder to cling to the skin is the__________________?
A. Cohesion
B. Adhesion
C. Capillary action
D. Surface tension
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to____________________?
A. Time
B. Square root of time
C. Cube of time
D. Square of time
Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about___________________?
A. 25
B. 10
C. 1
D. 50
____________________ flux is used for the extraction of metal from its self fluxing ores?
A. No
B. Basic
C. Acid
D. Neutral
Uniform ramming of sand in green sand moulding process leads to____________________?
A. Uniform flow of molten metal into the mould cavity
B. Greater dimensional stability of the casting
C. Reduced chance of gas porosity
D. Less sand expansion type of casting defect
At the point of boundary layer separation in fluid flow, the _____________________?
A. Shear stress is maximum
B. Density variation is maximum
C. Velocity gradient is flat
D. Shear stress is zero
In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is__________________?
A. Less
B. More
C. Equal
D. Much more
________________ property of steel increases by addition of large amount of silicon in it?
A. Machining
B. Mechanical
C. Magnetic
D. Refractory
When the wavelength of incident X-rays increases, the angle of diffraction__________________?
A. Decreases
B. Remain constant
C. Increases
D. Shows no systematic variation
Liquid nitrogen containers can be made from ___________________?
A. Titanium
B. HSLA steel
C. Ferritic stainless steel
D. Austenitic stainless steel
To counteract the bad effects of strain hardening on a cold formed part, it must be ______________________?
A. Normalised
B. Tempered
C. Annealed
D. Hardened
The thermodynamic law, PVy = constant, is not followed by the __________________?
A. Free expansion of an ideal gas
B. Adiabatic compression of air
C. Adiabatic expansion of steam in turbine
D. Ideal compression of air
Material of construction of foundry crucible is _________________?
A. Stainless steel
B. Lead
C. Graphite
D. Cast iron
_______________ test determines the yield strength, Young’s modulus of elasticity, percentage reduction in area & percentage elongation of a material ?
A. Tensile
B. Impact
C. Fatigue
D. None of these
Bad odour in sanitary latrines is reduced by periodically sprinkling_____________________?
A. Aluminium sulphate
B. Lime powder
C. Bleaching powder
D. None of these
The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively __________________?
A. 7 and 30
B. 10 and 50
C. 2 and 50
D. 13 and 55
Which of the following metals reacts violently with water ?
A. Calcium
B. Sodium
C. Mercury
D. Magnesium